The AirTAC GFR400C15MC3WTK AirTAC Filter Regulator NPT1/2 is a genuine G-series filter regulator: water separation, 40 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has See datasheet ports, a differential-pressure drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR400C15MC3WTK is a size 400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is decoded as a 1/2 in NPT port, 5 um filtration element (code W, finer than the 40 um standard), a manual drain on the bowl, a round pressure gauge reading in bar, a fitted reverse/check valve (code K), a standard (non low-pressure) regulator, and an included mounting bracket. Max inlet pressure is 1.0 MPa (145 psi), the regulator adjustment range with manual drain is 0.05-0.9 MPa (7-130 psi), and the working temperature range is -5 to 70 C (non-freezing). The bowl on this size 400 unit is polycarbonate (PC).
This is a genuine AirTAC part from the GFR400 series. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and with choices of thread (PT standard, G and NPT as options), drain type (differential-pressure, automatic or manual), filter grade (40 um standard, 5 um optional), gauge style and scale, reverse/check valve and bracket. Flow is published as curves rather than a single rated figure, so we confirm flow and datasheet figures on request.
| Model | GFR400C15MC3WTK AirTAC Filter Regulator NPT1/2 |
|---|---|
| Series | GFR400 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard type |
| Adjusting mechanism | Balanced type |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Drain type | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — factory standard, Factory standard scale |
| Reflux valve | Not fitted |
Specifications follow the official AirTAC G-series air-preparation data. The regulating band is set by the drain type: automatic and differential-pressure drains regulate 0.15 - 0.9 MPa, a manual drain regulates 0.05 - 0.9 MPa. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). Air must not freeze in the unit. Flow curves, weight and outline dimensions are not published in our data set — ask us and we will confirm from the factory datasheet.
| GFR400 | G-series filter regulator, 400 body — sets the port range. |
|---|---|
| C1 | Port size See datasheet. This body offers 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
Field order is size, port, drain, type, bracket, gauge, shape, scale, grade, thread, reflux — a blank position takes the default. Example: GFR300-08 is a 300 body, PT1/4", differential drain, standard type, bracket included, gauge fitted, 40 µm, PT thread, no reflux valve.
A larger body carries a larger port and holds set pressure better as flow rises. AirTAC publishes flow only as curves, so size the body from your peak demand with headroom. The GFR600 uses an aluminium-alloy bowl; the 200, 300 and 400 bodies use PC.
| This model | GFR400 · See datasheet · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-C1 (two-unit set) |
Feeding filtered, regulated air to the air-over-oil intensifier and clamping cylinders of a stamping press, with the 5 um element protecting seals and the check valve holding clamp pressure during a supply dip.
Supplying the gate and diverter cylinders along a packaging conveyor, where the regulator sets a stable operating pressure for consistent gate speed and the manual drain is serviced at shift checks.
Preparing air for spray guns and instrumentation in a coatings test booth, where the 5 um grade keeps fine particulate out of the finish and the bar gauge gives operators a local pressure readout.
Size 400 with a 1/2 in port sits in the upper half of the GFR range; step up to size 600 or down to size 300 depending on the flow your line needs - because flow is published as curves, not a single rating, ask us to confirm sizing against your application before ordering. This unit is already configured with the finer 5 um element (choose 40 um where only coarse water and particle removal is needed), a manual drain (simple and low-cost; choose automatic or differential-pressure drain where regular manual draining is impractical), a round bar-scale gauge (square embedded gauges and MPa/psi scales are alternatives), and a reverse/check valve that holds downstream pressure if upstream supply is lost. Thread is NPT here; PT is the standard and G is also an order option. A mounting bracket is included.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR400 series as curves rather than a single rated figure, so there is no one l/min or SCFM number we can honestly quote. Send us your application details and we will confirm the flow from the datasheet curves on request before you order.
The M in this code specifies a manual drain: moisture collected in the bowl is released by hand, which suits lines drained as part of a routine check. If nobody drains bowls regularly, an automatic or differential-pressure drain version is the better choice. The K specifies a fitted reverse/check valve, which holds downstream pressure if the upstream supply is interrupted. With manual drain the regulator adjustment range is 0.05-0.9 MPa (7-130 psi).
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity, thread type (PT / G / NPT), gauge scale and destination. We confirm price, availability and lead time — usually within 7-8 hours.